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+cvt is now bundled in xorg.
+
+the history of CVT:
+
+ DDC 1994
+
+ DMT = Discrete Monitor Timings
+ started in 1989
+
+ DMT Version 1.0, Revision 0.8 (1998)
+ = 28 VESA Standards
+ + 3 VESA Guidelines (approved, but not endorsed by VESA)
+ + 2 Industry Standards.
+
+ GTF in 1996
+ designed for CRT
+ doesn't account for different aspect ratios
+
+ CVT in 2003
+ to replace GTF
+
+ CVT-RB = Coordinated Video Timings-Reduced Blanking
+
+http://www.dell.com/downloads/global/vectors/2003_cvt.pdf
+http://www.vesa.org/Public/EEDIDguideV1.pdf